At a glance
George W Dunne Cook County Office Building is a 821,861-square-foot office building at 69 W. Washington Street in Chicago, Illinois, built in 1965. In its 2023 Chicago benchmarking disclosure it reported an ENERGY STAR score of 91 out of 100 (grade A), a site energy-use intensity of 51.6 kBtu/ft² and 3,921 tCO₂e of greenhouse-gas emissions. That score is higher than 91% of the 320 scored office buildings in Chicago.
Building Energy Use Benchmarking Ordinance · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 91 (band A) |
| Site EUI | 51.6 kBtu/ft² |
| Source EUI | 95.1 kBtu/ft² |
| GHG emissions | 3,921 tCO₂e |
| GHG intensity | 4.8 kgCO₂e/ft² |
| Electricity | 5,632,115 kWh |
| Natural gas | 232,034 therms |
| Water use | 5,161 kgal |
| Gross floor area | 821,861 sq ft |
| Source record | chicago:103699:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 91 | +5 | 51.6 kBtu/ft² | 3,921 tCO₂e |
| 2022 | 86 | +1 | 60.4 kBtu/ft² | 4,156 tCO₂e |
| 2021 | 85 | +7 | 56.0 kBtu/ft² | 4,380 tCO₂e |
| 2020 | 78 | -1 | 66.6 kBtu/ft² | 5,549 tCO₂e |
| 2019 | 79 | +6 | 75.9 kBtu/ft² | — |
| 2018 | 73 | -20 | 72.6 kBtu/ft² | 6,511 tCO₂e |
| 2017 | 93 | +2 | 65.6 kBtu/ft² | 6,574 tCO₂e |
| 2016 | 91 | ±0 | 70.7 kBtu/ft² | 7,133 tCO₂e |
| 2015 | 91 | +2 | 71.7 kBtu/ft² | 7,678 tCO₂e |
| 2014 | 89 | 82.0 kBtu/ft² | 8,401 tCO₂e |
Compliance context
Building Energy Use Benchmarking Ordinance
Covered buildings that fail to benchmark and report face fines of up to $100 plus $25 per day of violation under the ordinance.
Ownership
No owning organisation shown. Names of private individuals in the disclosure are not published here.
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Location
- Address
- 69 W. Washington Street
- City
- Chicago
- State
- Illinois
- ZIP
- 60602
- Coordinates
- 41.82773, -87.65947
Within ~1 km
Nearby benchmarked buildings
- Piccoloscore 65
K-12 School · 218,899 sq ft
- CDOT Central Officescore 60
Office · 100,000 sq ft
See also: most efficient in Chicago · biggest emitters
How does George W Dunne Cook County Office Building compare with other office buildings in Chicago?
The latest disclosures cover 387 office buildings in Chicago, out of 3,852 buildings citywide. George W Dunne Cook County Office Building's ENERGY STAR score of 91 compares with an average of 69 across the 320 that report a score; it scores higher than 91% of them and lower than 7%. Its site EUI of 51.6 kBtu/ft² is about 27% below the average of 70.4 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 4.8 kgCO₂e/ft² is about 36% below the group average of 7.5 kgCO₂e/ft².
At 821,861 sq ft, it is about 68% above the average floor area of 488,124 sq ft for those buildings. It was built in 1965, 9 years later than the group's average year built (1957). Across all 24 jurisdictions BuildingCensus covers, the 15,264 office buildings average an ENERGY STAR score of 73 and a site EUI of 59.3 kBtu/ft².
How has George W Dunne Cook County Office Building's energy performance changed over time?
BuildingCensus holds 10 Chicago disclosures for George W Dunne Cook County Office Building, covering report years 2014–2023. Its ENERGY STAR score went from 89 in 2014 to 91 in 2023 (+2 points); its best year on file was 2017, at 93. Site EUI moved from 82.0 kBtu/ft² (2014) to 51.6 kBtu/ft² (2023), a 37% decrease. Reported emissions went from 8,401 tCO₂e to 3,921 tCO₂e over the same span (down 53%).
What does an ENERGY STAR score of 91 mean?
ENERGY STAR scores run from 1 to 100 and are computed by the EPA's Portfolio Manager as a percentile against similar buildings nationwide, adjusted for climate, size and use: a score of 91 means the building performs better than about 91% of its national peers. BuildingCensus bands the score into report-card grades; 91 falls in band A — high performer (85–100). Scores of 75 or higher meet the threshold for ENERGY STAR certification; certification itself is a separate, verified application that the disclosure does not record. In Chicago, 35% of scored buildings are at 75 or above.
Site energy-use intensity (EUI) is the energy a building uses on site in a year divided by its floor area, in thousand Btu per square foot — lower is more efficient. George W Dunne Cook County Office Building's 51.6 kBtu/ft² across 821,861 sq ft works out to about 42.4 billion Btu (12,429 MWh-equivalent) in 2023. Its source EUI of 95.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 5,632,115 kWh of electricity, 232,034 therms of natural gas and 5,161 thousand gallons of water for the year.
Which law requires George W Dunne Cook County Office Building to report its energy use?
George W Dunne Cook County Office Building reports under the Building Energy Use Benchmarking Ordinance, the legal basis of the Chicago Energy Benchmarking program, which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2023 disclosure (source record chicago:103699:2023). Covered buildings that fail to benchmark and report face fines of up to $100 plus $25 per day of violation under the ordinance.
More office buildings in Chicago
- One East Wacker· 804,247 sq ft · score 92 (A)
- IL0303ZZ-METCALFE FED BLDG· 799,454 sq ft · score 88 (A)
- 200 West Adams St.· 789,024 sq ft · score 87 (A)
- 120 South Riverside Plaza· 787,045 sq ft · score 95 (A)
- 10 South Riverside Plaza· 786,938 sq ft · score 88 (A)
- 191 North Wacker· 778,325 sq ft · score 81 (B)
- Office buildings in Chicago· 387 benchmarked
- All Chicago benchmarked buildings· Building Energy Use Benchmarking Ordinance
- Most efficient large buildings in Chicago
- Least efficient large buildings in Chicago
- Biggest emitters in Chicago
Frequently asked questions
What is George W Dunne Cook County Office Building's energy grade?
George W Dunne Cook County Office Building scores 91 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2023 Chicago disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does George W Dunne Cook County Office Building use?
Its 2023 site energy-use intensity was 51.6 kBtu/ft² (95.1 kBtu/ft² source) across 821,861 sq ft, including 5,632,115 kWh of electricity and 232,034 therms of natural gas.
What are George W Dunne Cook County Office Building's carbon emissions?
George W Dunne Cook County Office Building reported 3,921 tCO₂e of greenhouse-gas emissions (4.8 kgCO₂e/ft²) for 2023.
Where is George W Dunne Cook County Office Building?
George W Dunne Cook County Office Building is at 69 W. Washington Street, in Chicago, Illinois 60602. Its coordinates are 41.82773, -87.65947 (latitude, longitude), as published in the Chicago Energy Benchmarking file.
How big is George W Dunne Cook County Office Building and when was it built?
George W Dunne Cook County Office Building has 821,861 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1965 as its year built. It is classed as office.
Is George W Dunne Cook County Office Building covered by the Building Energy Use Benchmarking Ordinance?
Yes — it appears in the 2023 Chicago Energy Benchmarking disclosure, which lists the buildings reporting under the Building Energy Use Benchmarking Ordinance.
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About this data
Source: Chicago Energy Benchmarking (Building Energy Use Benchmarking Ordinance), as published October 2, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “George W Dunne Cook County Office Building, Chicago, Illinois — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/chicago/george-w-dunne-cook-county-office-building-4606895a (data as of October 2, 2026).